The pictures aren't pretty, not even sexy IMHO. She looks drunk out of her mind and like she's been caught unaware. She's not really "posing". There is a professional quality to them (one of FMD's skills) and they had to be developed and printed privately -- no film prcessor would return those to the customer. They'd call the police instead.
And then there is the book he wrote about the seduction and sex education of an underage girl named Anne. He congratulated himself and his wife for giving Anne a sound education from caring people and that once awakened she "begged" for it -- came by the house daily and "begged" for it.
Did I mention that the whole concept of FMD, his “blond, buxom wife”, and Stanley Ann engaged in any form of sex is absolutely nauseating to me? Twosome, threesome. hetero, homo. It’s all nauseating and very, very sad. And very UNLIKE the normal for 1960.